›› 2011, Vol. 32 ›› Issue (2): 341-346.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Solving equation of rheological deformation in axisymmetric round well under dead load

HOU Gong-yu, LI Jing-jing, QIU Bin, ZHANG Hua-dong, LIU Hong-wei   

  1. School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
  • Received:2009-10-10 Online:2011-02-10 Published:2011-02-16

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Abstract:

Setting up the mathematical mechanical model of rheological deformation mechanism under the interaction between surrounding rock and support is an efficient way to solve the support problem in the underground rock engineering. How support affects it is the key problem in the process of rheological behavior of surrounding rock. According to the ideal elastoplastic solution of axisymmetric round well based on Levy-Mises model and D-P yield criterion, the assumption that all the tautochrones of one-dimensional creep curves are similar, and the results of three-dimensional rheological test, the creep equation of that primary rock stress and passive supporting force are constant; in the same time, surrounding rock is under 3D stresses is derived; and the formula for rheological deformation of nonlinear viscoelastic plasticity in axisymmetric round well is also proposed. Comparing to the works made by previous researchers, there are two parameters in the formula derived, initial rock stress and the uniaxial plastic yield stress of rock, which play decisive roles in the process of rheological deformation, for this reason, the theoretical foundation of the formula derived is more complete and credible.

Key words: rheological deformation of surrounding rock, 3D creep equation, effective stress, effective strain, creep compliance

CLC Number: 

  • TU 452
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